MNIHNAPA WATER SYSTEM
Montana — Community Water System — PWSID: 083090047
System Information
| PWSID | 083090047 |
| System Name | MNIHNAPA WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jun 24, 1991 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | Montana |
| City | HARLEM |
| ZIP Code | 59526 |
| Address | 164 Agency Main Street |
| Organization | RAMONE, KASEY |
| Phone | 406-353-8313 |
Population & Service
| Population Served | 220 |
| Service Connections | 51 |
Drinking Water Violations (203)
This water system has 203 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | — | 30 ug/L | — | Resolved | Mar 31, 2021 | — | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2021 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2020 | — | |
| Oct 1, 2020 | Dec 31, 2020 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2020 | — | |
| Aug 27, 2020 | — | MR | No | Yes | — | — | — | Resolved | Sep 14, 2020 | — | |
| Aug 1, 2020 | Aug 31, 2020 | MCL | Yes | No | — | — | — | Archived | Aug 31, 2020 | — | |
| Aug 1, 2020 | Aug 31, 2020 | MCL | Yes | No | — | — | — | Archived | Aug 31, 2020 | — | |
| Aug 1, 2020 | Aug 31, 2020 | MCL | Yes | No | — | — | — | Archived | Aug 31, 2020 | — | |
| Jul 1, 2020 | — | MR | No | No | — | TT | — | Resolved | Dec 15, 2021 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | — | — | Resolved | Feb 27, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.7 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | — | — | Resolved | Feb 27, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.04 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.5 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 30 ug/L | — | Resolved | Feb 27, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Feb 27, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Feb 27, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.00005 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Jun 30, 2020 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.0004 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 2 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.006 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.004 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.2 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.4 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.05 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.04 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | — | 0.003 mg/L | — | Resolved | Sep 30, 2019 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.